RRB GROUP D QUANT QUIZ

A pipe can fill a cistern in $7.8$ hours while another pipe can empty it in $19.5$ hours when the cistern is full. Both the pipes were opened when the cister was half empty. How long will it take to fill it?

Rs.7,800 is divided into 7 friends ( 3 boys and 4 girls ). The share of boys is three times to the share of girls then find the share of boys and girls.

The effective rate of interest, which corresponds to the nominal rate of 6% p.a., paid half-yearly, will be:

A wire is in the form of a circle of radius $70\mathrm{cm}$. If it is bent in the form of a rhombus, then what is its side length? (Take $\pi =\frac{22}{7}$ )

How many numbers are divisible by 3 or 7 in the number range of 50 to 200 ?

A sells an article to B making a profit of $\frac{2}{7}$ of its cost. B sells it to C, gaining $11.11\mathrm{\%}$. If $\mathrm{C}$ sells it for Rs. 1819 and incurs a loss of $15\mathrm{\%}$, then what is the cost price for $\mathrm{A}$ ?

The slant height and base diameter of a conical tomb are $25\mathrm{m}$ and $14\mathrm{m}$ respectively. Find the cost(in rupees) of white-washing its curved surface at the rate of Rs 210 per $100{\mathrm{m}}^2$.